Re: [Octaviz-help] Re: pcolor function

[Jonathan S. <jjs...@sb...>]

OK, I am not at all familiar with what you are trying to do.  I do see a 
vtk_pcolor function in Octaviz, though.  Have you tried it?

Jonathan


Fabian Braennstroem wrote:
> Hi Jonathan,
> 
> * On 30 Nov 2005 * Jonathan Stickel wrote:
> 
> 
>>Fabian
>>
>>I am not really sure what you are asking, perhaps because I do not know 
>>what 'tecplot' is or what its data is for.  The octaviz functions 
>>(vtk_something) are attempts to mimic high-level plotting commands that 
>>are available in Matlab.  Is there something in Matlab that you like 
>>that isn't yet in Octaviz?  Please point that out, and we can try to 
>>implement it.
> 
> 
> Sorry, I was not clear enough; I try it better:
> 
> I have some 3D data (coordinates and velocities) from a CFD simulation (actually in
> tecplot format, but since vtk does not have any reader for
> tecplot, the format is not important). I load these datas
> using 'load' in octave. Now, I would like to display the
> velocity field at a certain plane. Using original vtk
> commands and a vtk reader I would use the vtkCutter, e.g.:
> 
>   cutter = vtkCutter();
>   cutter.SetInput(reader.GetOutput());
> 
> In matlab I used the function 'pcolor', which does about the
> same as the 'cutter'.
> 
> As mentioned there exists no reader for my formated data, so
> I was asking, if it somehow possible to use the 'loaded'
> data aus input for the vtkCutter, e.g.:
> 
>   load data;
>   
>   x=data(:,1);
>   y=data(:,2);
>   z=data(:,3);
>   u=data(:,4);
>   
>   cutter= vtkCutter();
>   cutter.SetInput(x,y,z,u);
> 
> Using the pcolor function in matlab I had to 'reshape' the
> velocity: 
> 
>   U=reshape(u,size(x),size(y));
>   pcolor(x,y,U)
> 
> Maybe, you have an idea how to do that!?
> Probably the best way would be to convert those tecplot data
> into the ensight format ... unfortunately I was not able to
> do that yet :-(
> 
> 
> Greetings!
> Fabian
> 
> 
> 
>>Octaviz does allow you to use VTK objects and manipulate them.  The 
>>ClipCow.m example uses vtkCutter, so you can look at that if that is 
>>what you want.
>>
>>Jonathan
>>
>>
>>Fabian Braennstroem wrote:
>>
>>>Hi,
>>>
>>>I'm still using it :-)
>>>
>>>Right now, I have some trouble to display some 'tecplot'
>>>formated data using octaviz. One problem is, that their
>>>exist no reader in vtk for it. To get around that I would
>>>load the data into octave and display the data using pcolor,
>>>but that just would work in Matlab nicely. 
>>>
>>>Anyways, to get all simulation results in the same vtk-style
>>>I am looking for a vtk-function, which replaces 'pcolor'. In
>>>my point of view, the vtkCutter is the right modul, but I
>>>don't know, how I can get my data into it!? There does not
>>>exist a 'vtk_cutter' function similar to pcolor in octaviz,
>>>doesn't it? 
>>>
> 
>